What is defined as the dry, puckering sensation in the mouth caused by tannins?

The sensation described in the question is known as astringency, which specifically refers to the dry, puckering feeling in the mouth that occurs due to tannins found in certain foods and beverages, particularly in red wine and some fruits. Tannins are polyphenolic compounds that can bind to proteins in the saliva and tissues in the mouth, leading to this dry sensation. This is a distinctive characteristic of astringent substances and is an important attribute in the sensory evaluation of foods and wines, as it impacts the overall flavor profile and mouthfeel. In contrast, bitterness, sweetness, and umami are distinct taste sensations that do not describe the physical drying sensation that astringency does.